Multiple core-making machine



. 1,447,683. J. H. MORRIS.

MULTIPLE CORE MAKING MACHINE.

FILED FEB. 8. 1921.

Mar. 6, 1923.

I 4 SHEETS-SHEET I L j INVENTOR' d. H. Moms BY J ATTORNEY Mar. 6, 1923.

J. H. MORRIS. MULTIPLE CORE MAKING MACHINE.

FILED FEB. 8. 1921.

4 SHEETS-SHEET 2.

.JQIIQTI INVENTOR m J. H. Morris.

ATTORNEY Mar. 6, 1923. I. H. MORRIS.

MULTIPLE CORE MAKING MACHINE.

4 SHEETS-SHEET 3.

FILED FEB. 8, 1921- ATTORNEY 43 Mar.6,1923. 1,447,683. J- H. MORRIS.

MULTIPLE CORE MAKING MACHINE.

FILED FEB s. 1921. 4 SHEETS-SHEET 4.

Fig.6 Fic '7 n I H Fig. 8

"p ATTORNEY Patented Mar. 6, 1923.

NrrEn STATES time PATENT" Eris;

Joann; MoRRIs, on BIRMINGHAM, ALABAMA.

MULTIPLE CORE-MAKING MACHINE.

Application filed February 8, 1921. serial No. 443,457.

A certain new and useful Improvements in uneven thickness of walls.

Multiple Core-Making Machines, of which the following is aspecification.

My present invention relates to'a multiple cor making machine, the chiefobject of which is to substitute for the present manual adjustment ofthe knives a suitable mechanism which will present to the arbors, forvarious sized pipe, knives in accurate and proper adjustment for thefinish of the standard or extra heavy pipe, cores on such arbors. v n

One of the most serious problems in connection with the manufacture ofcast pipe or soil pipe, and particularly with the smaller sizes of lessthan6 diameter, has been to produce the cores with such accuracy thatthe pipe would not carry excess weight in metal, which represents a lossto the foundry, and which would not produce an abnormal percentag ofdefective castings by reason of In the ordinary foundry practice it iscustomary for the core maker to adjust the knives from time to timeaccording. to the work and this adjustment involves very accuratesetting of the knife edge relatively to the arbor axis so as to producea core of an exact diameter required for the productionof a given sizeof pipe so thatit will have a normal weight per unit of length.

Experience has proven that manual knife adjustment is so, unreliable asto cause, in the average output of a foundry, a veryconsiderablepercentage of rejected pipe as being over or under weight and the coremaker.

is continually seeking to reach a mean be,- tween these two extremes.

The object of this invention is to relieve the core maker of thenecessity ofadjusting the knife for the formation of different cores andwhen it is consideredthat in normal practice knife changes have tobemade as manvas thirty times a day, it will be at once apparent that alarg amount of the core makers time is wasted inthe making of thesechanges, all of which will be saved by a machine in which theadjustments are prearranged and it is only necessary to present theappropriat knife and its support in operative relation with the arborand th re sultantcore formed will be of the exact dimension desired. 5

The general practice heretofore has been to mount the arbors on rollersor slide journals on the core machin on which the arbor was rotatedduring the finishing of the core and it is obvious that, with length ofuse the friction-on both arbor and its supports and the presence of sandwill cause a substantial wear or the arbor or a displacement thereof. Inpractice, the arbors worn to varying extents are mountedsuccessively onthe core machine and it is therefore wholly impractical to adjust theknife with any regard to the extent of wear of each particular arbor.From this condition it follows that, as the arbor becomes worn, itchanges the diameter of the core. This change will involve an increaseor decrease in the core diameter according to the extent of wear on thearbor by which the knife was set, and conditions such as this'makeit-practically impossible with the present practice to avoid alarge variation in the weight of pipe manufactured. I proposeto overcomethis difiiculty inthe manufacture. of uniform weight pipe by takingofiof the arbor itself all opportunity for wear and this is most easilyaccomplished by providing the core machine with rotatable arborcentering journals which take all of the wear and thus protect the arboritself from any change in size. Moreover, should appreciable wear occurin these journals, the eifect thereof would be uniform throughout thecores made and would develop so gradually that an occa= sionaladjustment of the various. sized knives would compensate for such wear.

"A further object of my invention is to provide a rotatable framcarrying arbor journals and co-relatedknives for the varying sizes ofcores to be produced, the machine being adapted to be moved topresentany desired arbor journal and knife into operating position. v

A further object of my invention is to reduce the number of arborjournals by providing for each pair of journals a double knife supportcarrying knives for standard and extra heavy pipe for a given diameterwith suitable means for setting either knife in operating positionwithout requiring adjustment thereof.

My invention also comprises novel means for mounting the arbor in itscentering journals and for releasing it from the latter so that it canbe conveniently lifted off in the customary manner by core sticksinserted in the open ends of the arbor.

My invention also comprises the novel details of construction andarrangements of parts, which in their preferred embodiment only areillustrated in the accompanying drawings which form a part of thisspecification, and in which Fig. 1 is an end elevation of my improvedmultiple core making machine.

Fig. 2 is a front elevation of Fig. 1 with the arbor and the core beingformed thereon shown in cross section and one of the arbor views throughthe swinging journals for the arbor. V V

Fig. '8 is a. detail cross sectionalvi'ew of the handle and eccentricfor latching the arbor journal in operating position and operating thearbor support.

Fig. 9 is an enlarged detail view showing the taper pinson each knifeshaft and the lever for turning and holding the shaft in operatingposition. I Similar reference numerals refer to similar parts throughoutthe drawings.

According. to'the embodiment of my in.- vention which is illustratedinthe drawings and which may be obviously varied to suit differentconditions without departing from its principles of construction, I showa support for the multiple core making machine comprising end frames 1which are suitably anchored or braced at their bases and which areprovided overhead with journal bearings for the main shaft 2 which.rotatably supports the multiple core making machine proper. On thisshaft between the bearings I mount" two end plates which are similarandwhich are of an approximate star shape carrying on each of its fivesimilar arms 4 a complete core making machine, except the sand feedhopper 5 which is adaptedto cooperate with any one of the five coremaking machines which is brought into operating position beneath it. Aseach arm 4 and each of the complete core making machines carried therebyare alikaexcept astheymay be varied in size to produce the differentsizes of pipe cores, the description of one machine will serve; for all,and only'one will therefore be described. 1

Taking as the core making machine to be described thatwhich is shown inoperating position in F 1, the corresponding arms 4 on the star wheelwhich supportsuch ma chine are disposed with their upper facesin ahorizontalplane andto each upper face I bolt the outer squaredend 6 ofan axle? extending to tllQWtlll 8 of-the: adjacent arm 4 next above theone in question and the inner end of 'such. axle is further reduced andsupported ina bearing 9 in said wall 8. A-swinging journal frame 10 ismounted to rotate on each axle 7, having a handle 11 fast to its inneredge and extending, when in operating position, to the top of the face8' of the arm 4 next above it on its respective star wheel. Each armgl lis provided witha handle '12 and when made separate from the framethehandle is connected thereto by having the axle 7 passed through itslower end and a pin 13 inserted through its upper end. j a i V Thejournal frames 10 at each end of the machine are'alike, except that thechamber therein isa dapted to receive different bearings for the arborjournals The journal frame 10 at the left hand end of the machine(Fig; 1) is'designed to receive a crank operated'journal 14 (Fig. 6)carrying at its inner end a taper head 15 which is adapted to enter theopen end of acore arbor and center the arbor. relativelyto the axis ofthe journal". ()bviously the shape of this head may be changedto engagethe arbor in any way which will centerit. The journal is adapted torotate on ball bearings- 16 mounted in the inner open end of a sleeve20' seated in the chamber 17 in the frame, while the outer threaded 'endof the: journal carries a ball bearing 18 seated in the outer end ofsaid sleeve. 'The journal ends project throughbearing 18 and has fast onits outer end a crank 19 by means ofwhichthe journal 14 and its head15can be rotated in the frame-"about an axis at right angles to the axisofthe frame axle The'oppo slte ournal frame 10 carries a. similar jour naIl4, centering'head 15, ball bearings 16 and 18, and sleeve 20, but, inthis case the sleeve 20 is free to slide inthe chamber 21 in the journalframe and the sleeve has its" inner'ehd reduced to telescope into a.pipe 22 mounted in the outerend wall of the-frame 10. A coil spring 23is mounted in the chamber 21' surrounding'the pipe 22 and rob bearing onthe shoulder 24 onthe sleeve 20 so as to urge the latter, and with itthe journal bearing, towards the opposite journal. This is intended totake care of variations in arbor lengths and to maintain the requisitedriving friction between thecrank driven journal 14 and the arbor 25.

When the arbor is first placed in the machine, the frames 10 arebothswung outwardly to horizontal position on their axes 7 and it istherefore necessary to provide a temporary support for the arbor whichwill hold its ends in position to be engaged and centered by itsjournals when swung up into operating position to clamp the arborbetween them, after which the temporary support willrelease the arbor sothat it turns freely with the ournals. Such a temporary supporting meansis typically illustrated in Fig. 4. Here I show on the inner side ofeach corresponding pair of. arms a swinging pivoted supporting bar26,-which at its outer end is provided with an inturned sleeve 27 (seeFig. 8), which is inserted inandis free to turn in a bushing'28 flangedat each end and clamped in position in semi-circular seats provided inthe end 6 of the axle and in the outer endof its respective arm 4 (seeFig. The: bar 26 is held in position in the bushingby means of a pin 29which is inserted therethrough and has a threaded end projecting beyondthe sleeve 27 and adapted to receive the internally threaded boss 30 ona handle 31. The boss 30 is turned to make a snug fit in the outer endof the bushing 28. The inner headed end of the bolt is turned to form aneccentric 32 which receives aneccentricstrap 33 at the outer end of arod 34, which at its other end is provided with a yoke 35 whichstraddles and is pivoted by a bolt 36 to the free end of the arborsupportingbar 26 for the succeeding core making machine. The handle 31,when screwed tight on the bolt 29, serves as a means for rotatingthe'bolt and the eccentric to raise and lower the rod 34 mounted on itsrespective bolt. The handle on the arm 4 carrying the coremachine inoperative position .(Fig. 1) does not therefore control the supportingbar 26 which is intended to co-operate with the arbor of the operatingmachine, but such bar 26 is controlled by the handle 31? on the arm 4 inuppermost position (Fig. 1.) It will be noted that each handle 31projects into the path of an arm 11 on the adjacent arbor journal andthey thus serve as latches to prevent the outward movement of. thejournal frames, 10. lVhen the handles 31 are in latching position theireccentrics 32 are disposed to lower the rods 34 controlled thereby (seeFig. 4) and to drop the supporting bars 26-to which such rods areconnected out of engagement with the arbor, thus leaving the arbor freeto turn on its ball bearing journals. When,

however, the handles 31 are thrown to unlatched position the eccentricswill move to position to raise the rods 34andlift the bars 26 intoposition to engage and support the arbor thebars 26 having a groove 37in their'upper face to receive and center the arbor therein. The arms 11controlling the journal frames 10 being unlatched can be swung outwardlyapart from each other'to horizontal position, see the right hand journalbearing in Fig. 2, and when this occurs the arbor ends are exposed sothat the core sticks can be readily inserted therein for removing thecore. In like manner, when another arbor is placed in position, it is atfirst seated in the grooves 37 on the supporting bars 26and then thejournal frames, by means of their arms 11, are swung up to verticalposition and their" latch handles 31 are moved to latch the frames inoperating position and to lower the supporting bars 26 to clear'thearbor.

The knife supporting plates 3 are mounted loose on shaft 2 between thestar wheels 4 and are cross connected by five squared knife shafts 38.'The ends of these shafts are left rounded and are freeto turn in theplates 3. The shafts are mounted at gradually increasing distances fromthe shaft center 2 according to the diameter of the core to be formedthereby, andon each shaft one knife 39 is adapted for the formation of astandard weight pipe of a given diameter, and the other knife 40 onsaidshaft is designed to form a core for an extra heavy pipe of the samediameter. Through one end ofeach of the knife shafts I insert a pinhaving its opposite ends 41 slightly tapered and adapted to receive thesocketed end of a handle 42 which can be applied to a pin end for thepurpose of turning the shaft to present the desired knife in operatingposition. The lever itself is adaptedto engage a stop pin 43 on itsrespective star wheel arm 4 soas tobring the knife shaft to rest in itsoperating position. {The handle is removable so that the knife shaft canbe turned and the handle again presented and caused t engage thestop pinto hold the desired knife in operating position. For each set of journalbearings is provided its respective knife shaft and the knives on theshaft are attached thereto rigidly in proper adjustment by set screws44. v

In order to hold the star wheels 4 in the desired operating position'Iprovide on the bottom cross shaft 45v connecting the bases of thebearingl a, swinging latch arm 46 having at one end a handle'47 andnearthat a notch 48 in which the outer end of a star wheel army is adaptedto be received and held in fixed position. The other end of the latcharm is provided with a counterweight 49 to hold it in latching position.

The operation of the machine is as folmachine is rotated on its shaft 2until the,

core making machine of the deslred size' lows; Assuming the core makingmachine designed for the size of pipe core to .be produced is moved intoposition under the sand hopper 5 and the star wheel 4 latched in thisposition by the latch 46, and; also assuming that, by means of thehandle 42, the desired knife blade 39 or .40 has been pre sented inoperating positionin such machine, the appropriate handles 31 are0perated' to unlatchthe journal bearing arms 11 and the journal frames1'0 are swungouu Wardl-y. The arbor i s-laid in the grooves 3;? on theraised temporary arbor supporting bars 26 and the journal frames-arethen swung back to upright position so as to engage, clamp and centerthe arbor ends be tween them, whereupon the handles 3-1 are turned tolatch such journal frames in operating posit-ion and to lower thesupporting bars 26. The operator then grasps the crank 19 of theoperating machine and turns it, causing the arbor to turn therewith on:its roller bearing journals and as the sand falls from the hopper 5' itis caught by the knife 39 or to produce a core of the diameter desired,If the core be for a stand ard size type the knife 39 is used and foran; extra heavy pipe, the knife 40 .is used. The core maker can thuschange from stand and to extra heavy without loss of time or danger toinaccurateiadjustment, thereby greatly increasing his output and its'uniformity. If a different sized pipe core is, desired, the latch 46 isreleased and the core comes into operating position, whereupon it islatched in this-position by means of the latch 16 and the appropriateknife, 39 or 4:0

is moved to operating position and the manufacture of this differentsizecore proceeds withdispatchand with the same accuracy and uniformity.

In practice, the various knives 39' and 40 when once properly adjustedneed no further attention until natural wear, in the knives themselvesrequires it. I therefore reduce to a minimum all labor incident to knifechanging and adjustment. and maintain mechanically a standardization ofthe cores which will produce a uniform foundry product with a minimumwastage.

Having; thus described my invention, what I claim as new and] desire tosecure by Letters Patent, is:-.-

1. In a multiple core making mechanism, a movable carrier, a pluralityof core making machines for varying core sizes mounted on said carrier,vand means tolatch the carrier with the desired machine in operatingposition. j i

2. Ina multiple core making mechanism, a movable carrier, a plurality ofcore mak-' ing machines for varying core sizes mounted on saidcarrier,means to latch'the carrier with the desired machine inoperatingposition, and a hopper forfeeding sand to, the machine inoperating position.

3. Ina multiple core making mechanism, a rotatable frame, a plurality ofcore makingmachines for different; sized cores mounted on said frame,and means to latch the frame in position to present different machinesin operating position.

f.- In; a; multiple core; makingmechanism, a rotatableframe, a pluralityof core making machines for different sized cores mounted on said frame,m eans to latch the frame in position to present different machines inoperating position, and. a fixed sand hopperabo-ve the machine inoperating position. i i l i i 5. In a core making mechanism, a supporton which a core arbor is adapted to be 1 01 tated, a knife supporthaving a plurality of knives mounted thereon to form different sizedcores on said arbor, and meanston set said support with the desiredknife in operativeposition, said knife support being a shaft havingopposite parallel knife seats on. which the knives are mounted toproject in opposite directions, 7 j j 6, In a core makingmechanismmsupport on'which a core arbor is adapted to be rotatedya pivoted knifesupporting shaft having opposite parallel knife seats, .knives mountedon said seats to project inopposite directions and set to form cores fora standard and for an extra heavy pipe of agiven diametenthere beingopposite taper pins on said shaft, and means to set said'support withthe desired knife in operative position, said means comprising a handlehaving a taper socket to receive. one or the other of said taper pins.

7. In a core mal'cing mechanism, an arbor support, a pair of verticallyswinging journals adapted'to receive an arbor from said support, and aknife set with its edge and the axis of rotation of the arbor in a planesubstantially at right anglesto theplane inwhich the journalsswingi 8. Acore making 'mechahism, as described inclaim'T, in which the journalsare hinged to swing in. a vertical plane witlrthe axis of rotationofthearbor.

9. In a core making mechanism, vertically movable arbor supports,swinging journals adaptedto receive an arbor from said support, and acommon means. to latch the j0ur.- nals in operating position andadjustsaid sup'po-rtsj," I i Y j 10. A core making mechanism, as.described in claim.9, in which said meansis adapted to lowersaidsup-ports as it latches s aid'journals in operating position and viceversa. I

11. A core making mechanism, as described inclaim 9., inwhich saidcommon means comprises a latch and a crank mov able therewith, withoperating connections the core to be made on its said journals, and ifrom the crank to an arbor support. a knife support in fixed adjustmentrela- 10 12. In a core making mechanism, a suptively to the axis of itsrespective journals. port; a plurality of sets of arboir journals Intestimony whereof I afiix my signature. 5 mounted on said support, a knie support also mounted in said support for each set JOHN MORRIS of arborjournals and each spaced from its Witness: respective journals accordingto the size of NoMIE WI LSH.

